Electric shaver



S. P. WINTHER ELECTRIC SHAVER Feb. 1, 1955 2 Sheets-Sheet 1 Filed NGV.28, 1952 IN VEN TOR.

S. P. WINTHER Feb. 1, 1955 ELECTRIC SHAVER Filed Nov. 28, 1952 2Sheets-Sheet 2 4% Ji l nzswavllll A Swan P Wmfher 1N VEN TOR.

United States Patent 2,700,816 ELECTRIC SHAVER Simon P. Winther,Chicago, Ill., assignor of forty per cent to Leslie Krueger, Chicago,Ill.

Application November 28, 1952, Serial No. 322,945 1 Claim. (CI. 30-43)This invention relates to new and useful improvements and structuralrefinements in electric shavers, and the principal object of theinvention is to provide a shaver which is very simple in construction,which may be efficiently and conveniently manipulated and which may bereadily dissenibled for the purpose of conveniently replacing some ofits components when they become worn after a period of use.

Particular, the invention concerns itself with the provision of a shaverhaving a rotary, frusto-conical head carrying a set of cutter bladeswhich are engageable with the inner surface of a foraminous wall forwhisker shearing purposes, an important feature of the inventionresiding in the provision of means for resiliently and yieldablymounting the cutter blades on the rotary head so that the blades areyieldably urged in frictional engagement with the foraminous wall andalso, so that such blades may be conveniently and expeditiouslyreplaced, when necessary.

Some of the advantages of the invention lie in its simplicity ofconstruction, and in its efficient operation and in its adaptability toeconomical manufacure.

With the above more important objects and features in view and suchother objects and features as may become apparent as this specificationproceeds, the invention con sists essentially of the arrangement andconstruction of parts as illustrated in the accompanying drawings, inwhich:

Figure l is a perspective view of the invention;

Figure 2 is a longitudinal sectional view thereof;

Figure 3 is a transverse sectional view, taken substantially in theplane of the line 33 of Figure 2;

Figure 4 is an enlarged fragmentary sectional view illustrating thestructural arrangement of the rotary head and blade;

Figure 5 is an exployed perspective view of the rotary head and one ofthe blades, springs, and keeper elements; and,

Figure 6 is a fragmentary sectional detail, on an enlarged scale takensubstantially in the plane of the line 66 in Figure 2.

Like characters of reference are employed to designate like parts in thespecifications and throughout the several views.

Referring now to the accompanying drawings in detail, the electricshaver is designated generally by the reference character 10 andembodies in its construction a suitable housing 12 equipped with aremovable end wall 14 and also provided with a tapered extension 16, thelatter being equipped with a foraminous top wall 18.

The top wall 18 is adapted to be brought in contact with the skin onwhich whiskers are to be shaved, and it is to be observed that the topwall 18 is of a substantially semi-circular cross-section (see Figure 3)since the top wall, in fact, is in the shape of a portion of the lateralsurface of a cone.

A suitable electric motor designated generally by the referencecharacter 20, is mounted by fastening elements 22 in the housing 12 andincludes a drive shaft 24 which projects into the extension 16 coaxiallywith the top wall 18. The motor receives its supply of current through asuitable attachment cord 26 connected to terminals 28 on the end wall 14of the housing.

A substantially frusto-conical head 30 is secured to the drive shaft 24for rotation therewith and is provided with a plurality oflongitudinally extending slots 32.

These slots receive therein elongated cutter blades 34 which areprovided in outer edge portions thereof with pairs of notches 36. Theblades 34 are of such height that they project outwardly from thelateral surface of the head 30.

A substantially U-shaped keeper element 38 is mounted by a fasteningscrew 40 in a substantially U-shaped recess 42 provided in the lateralsurface of the head 30 2,700,816 Patented Feb. 1, 1955 adjacent each ofslots 32, the side portions of the recess 42 being intersected by theslot 32 as is clearly shown in Figure 5, so that when the keeper element38 is installed in the recess 42, the side portions 38' of the keeperelement are disposed in the notches 36 of the associated blade 34. Inthis manner, the several blades 36 are sustained in position in theslots 32, and it is to be observed that the slots also accommodateangulated springs 44 which are disposed in the bottom of the slots sothat they engage the inner edges of the blades 34 and thereby urge theblades outwardly from the head 30 into engagement with the intersurfaceof the foraminous top wall 18 of the extension 16.

The springs 44 have inturned end portions 44A, 44B, disposed at the endsof the head 30, so as to prevent the springs from shiftinglongitudinally in the slots 32.

When the invention is placed in use and the outer surface of theforaminous wall 18 is brought in contact with the face, rotation of thehead 30 and the blades 34 thereon will cause the blades to shear thewhiskers which project inwardly through the apertures in the wall 18. Itis to be noted that by virture of the coaxial disposition of the shaft24 with respect to the wall 18, the blades 34 will engage the entireinter-surface of the wall 18. However, the side and bottom portions ofthe housing extensions 16 are spaced from the head 30 sufficiently sothat the blades 34 do not contact the same, whereby the cut whiskers maydrop off the blades and accumulate in the lower portion 16A of theextension 16.

When it is desired to replace the blades 34 after a period of use, theforaminous wall 18 may be readily removed by pressing opposite sideportions thereof inwardly so as to retract flanges 45 at lower edges ofthe wall 18 from keeper grooves 46 which are formed in the housingextension 16A. It should be understood that the wall 18 is sufficientlyresilient so as to normally sustain the flanges 45 in the grooves 46.The blades themselves may be readily removed by simply removing thefastening screws 40 and the keeper elements 38, as will be readilyunderstood.

By removing the fastening elements 22 and the end wall 14, the motor 20,head 30 and blades 34 may be withdrawn from the housing as a unit.

lt is believed that the advantages and use of the invention will beclearly apparent from the foregoing disclosure and, accordingly furtherdescription thereof at this point is deemed unnecessary.

While in the foregoing there has been shown and described the preferredembodiment of this invention it is to be understood that minor changesin the details of construction, combination and arrangement of parts maybe resorted to without departing from the spirit and scope of theinvention as claimed.

What is claimed as new is as follows:

An electric shaver comprising a substantially cylindrical housingprovided integrally at one end thereof with an extension having an opentop and including a pair of side walls formed adjacent the open top witha pair of opposing keeper grooves, a substantially resilient andforaminous top wall removably positioned on said extension and having asemi-circular cross-section, outturned flanges provided at side edges ofsaid top wall and seated in said keeper grooves, an electric motorprovided in said housing and having an armature shaft disposed in saidextension coaxially with said top wall, a head mounted on said shaft anda set of cutter blades carried by said head and engageable with theinner surface of said top wall, said top wall having a configurationcorresponding substantially to a half of the frustum of a cone, said topwall being straight in a plane radial to the axis of said shaft and saidblades having straight cutting edges complemental to the inner surfaceof the top wall.

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References Cited in the file of this patent UNITED STATES PATENTS

